halist



(No Model.)

0. E. HAL-1N;

DBRRIGK.

N0. 314,015.` Patented Mar. 1'7, 1885.

Nrrn .STATES PATENT Fries.

OLE E. HALIN, OF SAN FRANCISCO, CALIFORNIA.

DERRICK.

SPECIFICATION forming part of Letters Patent No. `314:,015, dated March 17, 1885.

l Application filed January 26, 1885. (No model.)

fo aZZ'w/wm it may concern.-

Be it known that I, OLE E. HALIN, of the city and county of San Francisco, and State of California, have invented an Improvement in Derricks; and l hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to a new and useful derrick; and it consists in a platform snp ported by peculiarly-hinged folding legs, horizontal, spaced, and intermeshing gears, bearing sprocket or chain pulleys between them, a chain-tackle passing around and between the chain-pulleys and over guide-pulleys in the platform, a retaining-pawl for the chain, a hinged lever and ratchetwheel mechanism between it and the driving-shaft of the operatinggears, and in a mechanism for throwing the lever out of engagement, all of which I shall hereinafter fully explain.

The object of my invention is to provide a simple, powerful, and effective derrick.

Referring to the accompanying drawings, Figure l is a perspective view of my derrick. Fig. 2 is a top View of same.

A is a platform having legs B, here shown as three in number. The upper ends of these are connected with the bottom edge of the platform by means of link-hinges C, which are pivoted to both platform and legs,whereby in folding the legs may have sufficient play to prevent any straining on the hinges, and still when forced into aproper position, are adapted to form a support for the platform. The ob- ?,5 ject in having the legs to fold is to render the derrick readily transportable and easily setup.

On the platform is a bracket or boxing, D, in which are mounted the vertical shafts e, carrying the pairs of intermeshing spaced gears E. Between the gears of each pair is a sprocket-wheel or chain-pulley, F.

G is the chain-tackle. The chain passes up through the platform and over a vertical guide` pulley, II, and between the chain-pulleys, both of which engage its links. It thence passes around the back of one of them and forward again, down over a guide-pulley, H', to the block of the tackle, and thence up to the point of attachment under the platform.

I is a pawl secured to one end of the boxing and adapted to engage the chain to prevent its moving back. This pawl is released by a cord, i, attached to it, and which hangs down within reach of the operator.

The shaft e of one of the operating-gears extends upwardly beyond the boxing and is provided withl a ratchet-wheel, J.

VK is the operating-lever consisting of a beam again, it is necessary to throw the lever out of 7o engagement, or elseto allow it to swing around in a reverse direction. This is not desirable, and therefore I have the forked lever M, the arms of which bear under the rim of the ratchet-disk Z, and are pivoted to stops m on the top of the boxing D. W'ith this lever is connected a cord, N, by wliich,when pulled upon, the arms of the lever bearing on the stops m as fulcrum-points,raise the ratchet-disk Z and lever K out of engagement.

Having thus described my invention, what I y claim as new, and desire to secure by Letters Patent, is-

1. In a derrck, the elevated load-supporting platform A, in combination with the folding legs B, substantially as described.

2. In a derrck, the elevated load-supporting platform A, in combination with the legs B, and the pivoted hingelinks C, by which the legs are united to the platform, substantially as and for the purpose herein described.

3. In a derrck, the elevated platform A, having the intermeshing gears E and chainpulleys F, in combination with the chaintackle G, engaged by said pulleys and operatedby the gears, substantially as herein described.

4. In a derrck, the elevated platform A, the horizontal, spaced, and intermeshing pairs of gears E, and the intervening cliainpulleys ICO F, in combination with the chain-tackle G, engaged by the pulleys and operated by the gears, substantially as herein described'.

5. In a derrick, the elevated platform A, the horizontal, spaced, and intermeshing pairs of gears E, and the intervening chain-pulleys F, in combination with the vertical guidepulleys H H, and the chain-tackle G, guided by the pulleys H H', engaged by the pulleys F and operated by the gears, substantially as herein described.

6. In a derrick, the elevated platform A, the horizontal, spaced, and interrneshing pairs of gears E, and intervening chain-pulleys F, in combination with the chain-tackle G, engaged by the pulleys and operated by the gears, the retaining-pand I, engaging the chain and cord i, by which the pawl is disengaged, substantially as herein described.'

7. In a derriek, the elevated platform A, the horizontal, spaced, and intermeshing pairs of gears E, and intervening chain-pulleys F, by which the hoisting-tackle is operated, in

' combination with the lever K on the shaft of the horizontal gears E, and chain-pulleys F, by which the'hoisting-tackle is operated, and the ratchet-wheel J on the shaft of one of the gears, in combination with the lever K. the hinged sleeve L and the ratchet-disk l. fitted on the shaft and engaging the ratchet-wheel J, substantially as herein described.

10. In a derrick, the elevated platform A, the horizontal gears E, and chain-pulleys F, by which the hoisting-tackle is operated, and the ratchet-Wheel J on the shaft of one of the gears, in combination with the lever K, the hinged Vsleeve L and the ratchet-disk Z, tted on the shaft and engaging the ratchet-Wheel, and the forked lever M, bearing under the ratchet-disk and fulcrunled on stopsm, and the cord N, by which the lever M is operated, substantially as and for the purpose herein described.

l1'. A derrick consisting of the combination of the elevated platform` A, the folding legs B, the horizontal, spaced, and intermeshing pairs of gears E, and intervening chainpulleys F, the chain-tackle G, the retainingpaWl I, the hinged ratchet-lever K, engaging a ratchetwheel on the shaft of one of the pairs of gears, and the forked disengaging-lever M, all arranged and adapted to operate substantially as herein described.

In Witness whereof I have hereunto set my hand.

OLE E. HALIN. Vitnesses:

S. H. NoURsn, C. D. CoLn. 

